<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<title>Source code</title>
<link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style">
</head>
<body>
<div class="sourceContainer">
<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2012 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.reflect;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import com.google.common.annotations.Beta;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import com.google.common.annotations.VisibleForTesting;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import com.google.common.base.Splitter;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import com.google.common.collect.ImmutableMap;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import com.google.common.collect.ImmutableSet;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import com.google.common.collect.ImmutableSortedSet;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import com.google.common.collect.Maps;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import com.google.common.collect.Ordering;<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.io.File;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.io.IOException;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.net.URI;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import java.net.URISyntaxException;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import java.net.URL;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.net.URLClassLoader;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import java.util.Enumeration;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import java.util.LinkedHashMap;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import java.util.Map;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import java.util.jar.JarEntry;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import java.util.jar.JarFile;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import java.util.jar.Manifest;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import java.util.logging.Logger;<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>import javax.annotation.Nullable;<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>/**<a name="line.46"></a>
<span class="sourceLineNo">047</span> * Scans the source of a {@link ClassLoader} and finds all the classes loadable.<a name="line.47"></a>
<span class="sourceLineNo">048</span> *<a name="line.48"></a>
<span class="sourceLineNo">049</span> * @author Ben Yu<a name="line.49"></a>
<span class="sourceLineNo">050</span> * @since 14.0<a name="line.50"></a>
<span class="sourceLineNo">051</span> */<a name="line.51"></a>
<span class="sourceLineNo">052</span>@Beta<a name="line.52"></a>
<span class="sourceLineNo">053</span>public final class ClassPath {<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>  private static final Logger logger = Logger.getLogger(ClassPath.class.getName());<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>  /** Separator for the Class-Path manifest attribute value in jar files. */<a name="line.57"></a>
<span class="sourceLineNo">058</span>  private static final Splitter CLASS_PATH_ATTRIBUTE_SEPARATOR =<a name="line.58"></a>
<span class="sourceLineNo">059</span>      Splitter.on(" ").omitEmptyStrings();<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>  private static final String CLASS_FILE_NAME_EXTENSION = ".class";<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>  private final ImmutableSet&lt;ClassInfo&gt; classes;<a name="line.63"></a>
<span class="sourceLineNo">064</span><a name="line.64"></a>
<span class="sourceLineNo">065</span>  private ClassPath(ImmutableSet&lt;ClassInfo&gt; classes) {<a name="line.65"></a>
<span class="sourceLineNo">066</span>    this.classes = classes;<a name="line.66"></a>
<span class="sourceLineNo">067</span>  }<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span>  /**<a name="line.69"></a>
<span class="sourceLineNo">070</span>   * Returns a {@code ClassPath} representing all classes loadable from {@code classloader} and its<a name="line.70"></a>
<span class="sourceLineNo">071</span>   * parent class loaders.<a name="line.71"></a>
<span class="sourceLineNo">072</span>   *<a name="line.72"></a>
<span class="sourceLineNo">073</span>   * &lt;p&gt;Currently only {@link URLClassLoader} and only {@code file://} urls are supported.<a name="line.73"></a>
<span class="sourceLineNo">074</span>   *<a name="line.74"></a>
<span class="sourceLineNo">075</span>   * @throws IOException if the attempt to read class path resources (jar files or directories)<a name="line.75"></a>
<span class="sourceLineNo">076</span>   *         failed.<a name="line.76"></a>
<span class="sourceLineNo">077</span>   */<a name="line.77"></a>
<span class="sourceLineNo">078</span>  public static ClassPath from(ClassLoader classloader) throws IOException {<a name="line.78"></a>
<span class="sourceLineNo">079</span>    ImmutableSortedSet.Builder&lt;ClassInfo&gt; builder = new ImmutableSortedSet.Builder&lt;ClassInfo&gt;(<a name="line.79"></a>
<span class="sourceLineNo">080</span>        Ordering.usingToString());<a name="line.80"></a>
<span class="sourceLineNo">081</span>    for (Map.Entry&lt;URI, ClassLoader&gt; entry : getClassPathEntries(classloader).entrySet()) {<a name="line.81"></a>
<span class="sourceLineNo">082</span>      builder.addAll(readClassesFrom(entry.getKey(), entry.getValue()));<a name="line.82"></a>
<span class="sourceLineNo">083</span>    }<a name="line.83"></a>
<span class="sourceLineNo">084</span>    return new ClassPath(builder.build());<a name="line.84"></a>
<span class="sourceLineNo">085</span>  }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>  /** Returns all top level classes loadable from the current class path. */<a name="line.87"></a>
<span class="sourceLineNo">088</span>  public ImmutableSet&lt;ClassInfo&gt; getTopLevelClasses() {<a name="line.88"></a>
<span class="sourceLineNo">089</span>    return classes;<a name="line.89"></a>
<span class="sourceLineNo">090</span>  }<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>
<span class="sourceLineNo">092</span>  /** Returns all top level classes whose package name is {@code packageName}. */<a name="line.92"></a>
<span class="sourceLineNo">093</span>  public ImmutableSet&lt;ClassInfo&gt; getTopLevelClasses(String packageName) {<a name="line.93"></a>
<span class="sourceLineNo">094</span>    checkNotNull(packageName);<a name="line.94"></a>
<span class="sourceLineNo">095</span>    ImmutableSet.Builder&lt;ClassInfo&gt; builder = ImmutableSet.builder();<a name="line.95"></a>
<span class="sourceLineNo">096</span>    for (ClassInfo classInfo : classes) {<a name="line.96"></a>
<span class="sourceLineNo">097</span>      if (classInfo.getPackageName().equals(packageName)) {<a name="line.97"></a>
<span class="sourceLineNo">098</span>        builder.add(classInfo);<a name="line.98"></a>
<span class="sourceLineNo">099</span>      }<a name="line.99"></a>
<span class="sourceLineNo">100</span>    }<a name="line.100"></a>
<span class="sourceLineNo">101</span>    return builder.build();<a name="line.101"></a>
<span class="sourceLineNo">102</span>  }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>  /**<a name="line.104"></a>
<span class="sourceLineNo">105</span>   * Returns all top level classes whose package name is {@code packageName} or starts with<a name="line.105"></a>
<span class="sourceLineNo">106</span>   * {@code packageName} followed by a '.'.<a name="line.106"></a>
<span class="sourceLineNo">107</span>   */<a name="line.107"></a>
<span class="sourceLineNo">108</span>  public ImmutableSet&lt;ClassInfo&gt; getTopLevelClassesRecursive(String packageName) {<a name="line.108"></a>
<span class="sourceLineNo">109</span>    checkNotNull(packageName);<a name="line.109"></a>
<span class="sourceLineNo">110</span>    String packagePrefix = packageName + '.';<a name="line.110"></a>
<span class="sourceLineNo">111</span>    ImmutableSet.Builder&lt;ClassInfo&gt; builder = ImmutableSet.builder();<a name="line.111"></a>
<span class="sourceLineNo">112</span>    for (ClassInfo classInfo : classes) {<a name="line.112"></a>
<span class="sourceLineNo">113</span>      if (classInfo.getName().startsWith(packagePrefix)) {<a name="line.113"></a>
<span class="sourceLineNo">114</span>        builder.add(classInfo);<a name="line.114"></a>
<span class="sourceLineNo">115</span>      }<a name="line.115"></a>
<span class="sourceLineNo">116</span>    }<a name="line.116"></a>
<span class="sourceLineNo">117</span>    return builder.build();<a name="line.117"></a>
<span class="sourceLineNo">118</span>  }<a name="line.118"></a>
<span class="sourceLineNo">119</span><a name="line.119"></a>
<span class="sourceLineNo">120</span>  /** Represents a class that can be loaded through {@link #load}. */<a name="line.120"></a>
<span class="sourceLineNo">121</span>  public static final class ClassInfo {<a name="line.121"></a>
<span class="sourceLineNo">122</span>    private final String className;<a name="line.122"></a>
<span class="sourceLineNo">123</span>    private final ClassLoader loader;<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span>    @VisibleForTesting ClassInfo(String className, ClassLoader loader) {<a name="line.125"></a>
<span class="sourceLineNo">126</span>      this.className = checkNotNull(className);<a name="line.126"></a>
<span class="sourceLineNo">127</span>      this.loader = checkNotNull(loader);<a name="line.127"></a>
<span class="sourceLineNo">128</span>    }<a name="line.128"></a>
<span class="sourceLineNo">129</span><a name="line.129"></a>
<span class="sourceLineNo">130</span>    /** Returns the package name of the class, without attempting to load the class. */<a name="line.130"></a>
<span class="sourceLineNo">131</span>    public String getPackageName() {<a name="line.131"></a>
<span class="sourceLineNo">132</span>      return Reflection.getPackageName(className);<a name="line.132"></a>
<span class="sourceLineNo">133</span>    }<a name="line.133"></a>
<span class="sourceLineNo">134</span><a name="line.134"></a>
<span class="sourceLineNo">135</span>    /** Returns the simple name of the underlying class as given in the source code. */<a name="line.135"></a>
<span class="sourceLineNo">136</span>    public String getSimpleName() {<a name="line.136"></a>
<span class="sourceLineNo">137</span>      String packageName = getPackageName();<a name="line.137"></a>
<span class="sourceLineNo">138</span>      if (packageName.isEmpty()) {<a name="line.138"></a>
<span class="sourceLineNo">139</span>        return className;<a name="line.139"></a>
<span class="sourceLineNo">140</span>      }<a name="line.140"></a>
<span class="sourceLineNo">141</span>      // Since this is a top level class, its simple name is always the part after package name.<a name="line.141"></a>
<span class="sourceLineNo">142</span>      return className.substring(packageName.length() + 1);<a name="line.142"></a>
<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>    /** Returns the fully qualified name of the class. */<a name="line.145"></a>
<span class="sourceLineNo">146</span>    public String getName() {<a name="line.146"></a>
<span class="sourceLineNo">147</span>      return className;<a name="line.147"></a>
<span class="sourceLineNo">148</span>    }<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
<span class="sourceLineNo">150</span>    /** Loads (but doesn't link or initialize) the class. */<a name="line.150"></a>
<span class="sourceLineNo">151</span>    public Class&lt;?&gt; load() {<a name="line.151"></a>
<span class="sourceLineNo">152</span>      try {<a name="line.152"></a>
<span class="sourceLineNo">153</span>        return loader.loadClass(className);<a name="line.153"></a>
<span class="sourceLineNo">154</span>      } catch (ClassNotFoundException e) {<a name="line.154"></a>
<span class="sourceLineNo">155</span>        // Shouldn't happen, since the class name is read from the class path.<a name="line.155"></a>
<span class="sourceLineNo">156</span>        throw new IllegalStateException(e);<a name="line.156"></a>
<span class="sourceLineNo">157</span>      }<a name="line.157"></a>
<span class="sourceLineNo">158</span>    }<a name="line.158"></a>
<span class="sourceLineNo">159</span><a name="line.159"></a>
<span class="sourceLineNo">160</span>    @Override public int hashCode() {<a name="line.160"></a>
<span class="sourceLineNo">161</span>      return className.hashCode();<a name="line.161"></a>
<span class="sourceLineNo">162</span>    }<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span>    @Override public boolean equals(Object obj) {<a name="line.164"></a>
<span class="sourceLineNo">165</span>      if (obj instanceof ClassInfo) {<a name="line.165"></a>
<span class="sourceLineNo">166</span>        ClassInfo that = (ClassInfo) obj;<a name="line.166"></a>
<span class="sourceLineNo">167</span>        return className.equals(that.className)<a name="line.167"></a>
<span class="sourceLineNo">168</span>            &amp;&amp; loader == that.loader;<a name="line.168"></a>
<span class="sourceLineNo">169</span>      }<a name="line.169"></a>
<span class="sourceLineNo">170</span>      return false;<a name="line.170"></a>
<span class="sourceLineNo">171</span>    }<a name="line.171"></a>
<span class="sourceLineNo">172</span><a name="line.172"></a>
<span class="sourceLineNo">173</span>    @Override public String toString() {<a name="line.173"></a>
<span class="sourceLineNo">174</span>      return className;<a name="line.174"></a>
<span class="sourceLineNo">175</span>    }<a name="line.175"></a>
<span class="sourceLineNo">176</span>  }<a name="line.176"></a>
<span class="sourceLineNo">177</span><a name="line.177"></a>
<span class="sourceLineNo">178</span>  @VisibleForTesting static ImmutableMap&lt;URI, ClassLoader&gt; getClassPathEntries(<a name="line.178"></a>
<span class="sourceLineNo">179</span>      ClassLoader classloader) {<a name="line.179"></a>
<span class="sourceLineNo">180</span>    LinkedHashMap&lt;URI, ClassLoader&gt; entries = Maps.newLinkedHashMap();<a name="line.180"></a>
<span class="sourceLineNo">181</span>    // Search parent first, since it's the order ClassLoader#loadClass() uses.<a name="line.181"></a>
<span class="sourceLineNo">182</span>    ClassLoader parent = classloader.getParent();<a name="line.182"></a>
<span class="sourceLineNo">183</span>    if (parent != null) {<a name="line.183"></a>
<span class="sourceLineNo">184</span>      entries.putAll(getClassPathEntries(parent));<a name="line.184"></a>
<span class="sourceLineNo">185</span>    }<a name="line.185"></a>
<span class="sourceLineNo">186</span>    if (classloader instanceof URLClassLoader) {<a name="line.186"></a>
<span class="sourceLineNo">187</span>      URLClassLoader urlClassLoader = (URLClassLoader) classloader;<a name="line.187"></a>
<span class="sourceLineNo">188</span>      for (URL entry : urlClassLoader.getURLs()) {<a name="line.188"></a>
<span class="sourceLineNo">189</span>        URI uri;<a name="line.189"></a>
<span class="sourceLineNo">190</span>        try {<a name="line.190"></a>
<span class="sourceLineNo">191</span>          uri = entry.toURI();<a name="line.191"></a>
<span class="sourceLineNo">192</span>        } catch (URISyntaxException e) {<a name="line.192"></a>
<span class="sourceLineNo">193</span>          throw new IllegalArgumentException(e);<a name="line.193"></a>
<span class="sourceLineNo">194</span>        }<a name="line.194"></a>
<span class="sourceLineNo">195</span>        if (!entries.containsKey(uri)) {<a name="line.195"></a>
<span class="sourceLineNo">196</span>          entries.put(uri, classloader);<a name="line.196"></a>
<span class="sourceLineNo">197</span>        }<a name="line.197"></a>
<span class="sourceLineNo">198</span>      }<a name="line.198"></a>
<span class="sourceLineNo">199</span>    }<a name="line.199"></a>
<span class="sourceLineNo">200</span>    return ImmutableMap.copyOf(entries);<a name="line.200"></a>
<span class="sourceLineNo">201</span>  }<a name="line.201"></a>
<span class="sourceLineNo">202</span><a name="line.202"></a>
<span class="sourceLineNo">203</span>  private static ImmutableSet&lt;ClassInfo&gt; readClassesFrom(URI uri, ClassLoader classloader)<a name="line.203"></a>
<span class="sourceLineNo">204</span>      throws IOException {<a name="line.204"></a>
<span class="sourceLineNo">205</span>    if (uri.getScheme().equals("file")) {<a name="line.205"></a>
<span class="sourceLineNo">206</span>      return readClassesFrom(new File(uri), classloader);<a name="line.206"></a>
<span class="sourceLineNo">207</span>    } else {<a name="line.207"></a>
<span class="sourceLineNo">208</span>      return ImmutableSet.of();<a name="line.208"></a>
<span class="sourceLineNo">209</span>    }<a name="line.209"></a>
<span class="sourceLineNo">210</span>  }<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span>  @VisibleForTesting static ImmutableSet&lt;ClassInfo&gt; readClassesFrom(<a name="line.212"></a>
<span class="sourceLineNo">213</span>      File file, ClassLoader classloader)<a name="line.213"></a>
<span class="sourceLineNo">214</span>      throws IOException {<a name="line.214"></a>
<span class="sourceLineNo">215</span>    if (!file.exists()) {<a name="line.215"></a>
<span class="sourceLineNo">216</span>      return ImmutableSet.of();<a name="line.216"></a>
<span class="sourceLineNo">217</span>    }<a name="line.217"></a>
<span class="sourceLineNo">218</span>    if (file.isDirectory()) {<a name="line.218"></a>
<span class="sourceLineNo">219</span>      return readClassesFromDirectory(file, classloader);<a name="line.219"></a>
<span class="sourceLineNo">220</span>    } else {<a name="line.220"></a>
<span class="sourceLineNo">221</span>      return readClassesFromJar(file, classloader);<a name="line.221"></a>
<span class="sourceLineNo">222</span>    }<a name="line.222"></a>
<span class="sourceLineNo">223</span>  }<a name="line.223"></a>
<span class="sourceLineNo">224</span><a name="line.224"></a>
<span class="sourceLineNo">225</span>  private static ImmutableSet&lt;ClassInfo&gt; readClassesFromDirectory(<a name="line.225"></a>
<span class="sourceLineNo">226</span>      File directory, ClassLoader classloader) {<a name="line.226"></a>
<span class="sourceLineNo">227</span>    ImmutableSet.Builder&lt;ClassInfo&gt; builder = ImmutableSet.builder();<a name="line.227"></a>
<span class="sourceLineNo">228</span>    readClassesFromDirectory(directory, classloader, "", builder);<a name="line.228"></a>
<span class="sourceLineNo">229</span>    return builder.build();<a name="line.229"></a>
<span class="sourceLineNo">230</span>  }<a name="line.230"></a>
<span class="sourceLineNo">231</span><a name="line.231"></a>
<span class="sourceLineNo">232</span>  private static void readClassesFromDirectory(<a name="line.232"></a>
<span class="sourceLineNo">233</span>      File directory, ClassLoader classloader,<a name="line.233"></a>
<span class="sourceLineNo">234</span>      String packagePrefix, ImmutableSet.Builder&lt;ClassInfo&gt; builder) {<a name="line.234"></a>
<span class="sourceLineNo">235</span>    for (File f : directory.listFiles()) {<a name="line.235"></a>
<span class="sourceLineNo">236</span>      String name = f.getName();<a name="line.236"></a>
<span class="sourceLineNo">237</span>      if (f.isDirectory()) {<a name="line.237"></a>
<span class="sourceLineNo">238</span>        readClassesFromDirectory(f, classloader, packagePrefix + name + ".", builder);<a name="line.238"></a>
<span class="sourceLineNo">239</span>      } else if (isTopLevelClassFile(name)) {<a name="line.239"></a>
<span class="sourceLineNo">240</span>        String className = packagePrefix + getClassName(name);<a name="line.240"></a>
<span class="sourceLineNo">241</span>        builder.add(new ClassInfo(className, classloader));<a name="line.241"></a>
<span class="sourceLineNo">242</span>      }<a name="line.242"></a>
<span class="sourceLineNo">243</span>    }<a name="line.243"></a>
<span class="sourceLineNo">244</span>  }<a name="line.244"></a>
<span class="sourceLineNo">245</span><a name="line.245"></a>
<span class="sourceLineNo">246</span>  private static ImmutableSet&lt;ClassInfo&gt; readClassesFromJar(File file, ClassLoader classloader)<a name="line.246"></a>
<span class="sourceLineNo">247</span>      throws IOException {<a name="line.247"></a>
<span class="sourceLineNo">248</span>    ImmutableSet.Builder&lt;ClassInfo&gt; builder = ImmutableSet.builder();<a name="line.248"></a>
<span class="sourceLineNo">249</span>    JarFile jarFile = new JarFile(file);<a name="line.249"></a>
<span class="sourceLineNo">250</span>    for (URI uri : getClassPathFromManifest(file, jarFile.getManifest())) {<a name="line.250"></a>
<span class="sourceLineNo">251</span>      builder.addAll(readClassesFrom(uri, classloader));<a name="line.251"></a>
<span class="sourceLineNo">252</span>    }<a name="line.252"></a>
<span class="sourceLineNo">253</span>    Enumeration&lt;JarEntry&gt; entries = jarFile.entries();<a name="line.253"></a>
<span class="sourceLineNo">254</span>    while (entries.hasMoreElements()) {<a name="line.254"></a>
<span class="sourceLineNo">255</span>      JarEntry entry = entries.nextElement();<a name="line.255"></a>
<span class="sourceLineNo">256</span>      if (isTopLevelClassFile(entry.getName())) {<a name="line.256"></a>
<span class="sourceLineNo">257</span>        String className = getClassName(entry.getName().replace('/', '.'));<a name="line.257"></a>
<span class="sourceLineNo">258</span>        builder.add(new ClassInfo(className, classloader));<a name="line.258"></a>
<span class="sourceLineNo">259</span>      }<a name="line.259"></a>
<span class="sourceLineNo">260</span>    }<a name="line.260"></a>
<span class="sourceLineNo">261</span>    return builder.build();<a name="line.261"></a>
<span class="sourceLineNo">262</span>  }<a name="line.262"></a>
<span class="sourceLineNo">263</span><a name="line.263"></a>
<span class="sourceLineNo">264</span>  /**<a name="line.264"></a>
<span class="sourceLineNo">265</span>   * Returns the class path URIs specified by the {@code Class-Path} manifest attribute, according<a name="line.265"></a>
<span class="sourceLineNo">266</span>   * to &lt;a href="http://docs.oracle.com/javase/1.4.2/docs/guide/jar/jar.html#Main%20Attributes"&gt;<a name="line.266"></a>
<span class="sourceLineNo">267</span>   * JAR File Specification&lt;/a&gt;. If {@code manifest} is null, it means the jar file has no manifest,<a name="line.267"></a>
<span class="sourceLineNo">268</span>   * and an empty set will be returned.<a name="line.268"></a>
<span class="sourceLineNo">269</span>   */<a name="line.269"></a>
<span class="sourceLineNo">270</span>  @VisibleForTesting static ImmutableSet&lt;URI&gt; getClassPathFromManifest(<a name="line.270"></a>
<span class="sourceLineNo">271</span>      File jarFile, @Nullable Manifest manifest) {<a name="line.271"></a>
<span class="sourceLineNo">272</span>    if (manifest == null) {<a name="line.272"></a>
<span class="sourceLineNo">273</span>      return ImmutableSet.of();<a name="line.273"></a>
<span class="sourceLineNo">274</span>    }<a name="line.274"></a>
<span class="sourceLineNo">275</span>    ImmutableSet.Builder&lt;URI&gt; builder = ImmutableSet.builder();<a name="line.275"></a>
<span class="sourceLineNo">276</span>    String classpathAttribute = manifest.getMainAttributes().getValue("Class-Path");<a name="line.276"></a>
<span class="sourceLineNo">277</span>    if (classpathAttribute != null) {<a name="line.277"></a>
<span class="sourceLineNo">278</span>      for (String path : CLASS_PATH_ATTRIBUTE_SEPARATOR.split(classpathAttribute)) {<a name="line.278"></a>
<span class="sourceLineNo">279</span>        URI uri;<a name="line.279"></a>
<span class="sourceLineNo">280</span>        try {<a name="line.280"></a>
<span class="sourceLineNo">281</span>          uri = getClassPathEntry(jarFile, path);<a name="line.281"></a>
<span class="sourceLineNo">282</span>        } catch (URISyntaxException e) {<a name="line.282"></a>
<span class="sourceLineNo">283</span>          // Ignore bad entry<a name="line.283"></a>
<span class="sourceLineNo">284</span>          logger.warning("Invalid Class-Path entry: " + path);<a name="line.284"></a>
<span class="sourceLineNo">285</span>          continue;<a name="line.285"></a>
<span class="sourceLineNo">286</span>        }<a name="line.286"></a>
<span class="sourceLineNo">287</span>        builder.add(uri);<a name="line.287"></a>
<span class="sourceLineNo">288</span>      }<a name="line.288"></a>
<span class="sourceLineNo">289</span>    }<a name="line.289"></a>
<span class="sourceLineNo">290</span>    return builder.build();<a name="line.290"></a>
<span class="sourceLineNo">291</span>  }<a name="line.291"></a>
<span class="sourceLineNo">292</span><a name="line.292"></a>
<span class="sourceLineNo">293</span>  /**<a name="line.293"></a>
<span class="sourceLineNo">294</span>   * Returns the absolute uri of the Class-Path entry value as specified in<a name="line.294"></a>
<span class="sourceLineNo">295</span>   * &lt;a href="http://docs.oracle.com/javase/1.4.2/docs/guide/jar/jar.html#Main%20Attributes"&gt;<a name="line.295"></a>
<span class="sourceLineNo">296</span>   * JAR File Specification&lt;/a&gt;. Even though the specification only talks about relative urls,<a name="line.296"></a>
<span class="sourceLineNo">297</span>   * absolute urls are actually supported too (for example, in Maven surefire plugin).<a name="line.297"></a>
<span class="sourceLineNo">298</span>   */<a name="line.298"></a>
<span class="sourceLineNo">299</span>  @VisibleForTesting static URI getClassPathEntry(File jarFile, String path)<a name="line.299"></a>
<span class="sourceLineNo">300</span>      throws URISyntaxException {<a name="line.300"></a>
<span class="sourceLineNo">301</span>    URI uri = new URI(path);<a name="line.301"></a>
<span class="sourceLineNo">302</span>    if (uri.isAbsolute()) {<a name="line.302"></a>
<span class="sourceLineNo">303</span>      return uri;<a name="line.303"></a>
<span class="sourceLineNo">304</span>    } else {<a name="line.304"></a>
<span class="sourceLineNo">305</span>      return new File(jarFile.getParentFile(), path.replace('/', File.separatorChar)).toURI();<a name="line.305"></a>
<span class="sourceLineNo">306</span>    }<a name="line.306"></a>
<span class="sourceLineNo">307</span>  }<a name="line.307"></a>
<span class="sourceLineNo">308</span><a name="line.308"></a>
<span class="sourceLineNo">309</span>  @VisibleForTesting static boolean isTopLevelClassFile(String filename) {<a name="line.309"></a>
<span class="sourceLineNo">310</span>    return filename.endsWith(CLASS_FILE_NAME_EXTENSION) &amp;&amp; filename.indexOf('$') &lt; 0;<a name="line.310"></a>
<span class="sourceLineNo">311</span>  }<a name="line.311"></a>
<span class="sourceLineNo">312</span><a name="line.312"></a>
<span class="sourceLineNo">313</span>  @VisibleForTesting static String getClassName(String filename) {<a name="line.313"></a>
<span class="sourceLineNo">314</span>    int classNameEnd = filename.length() - CLASS_FILE_NAME_EXTENSION.length();<a name="line.314"></a>
<span class="sourceLineNo">315</span>    return filename.substring(0, classNameEnd);<a name="line.315"></a>
<span class="sourceLineNo">316</span>  }<a name="line.316"></a>
<span class="sourceLineNo">317</span>}<a name="line.317"></a>




























































</pre>
</div>
</body>
</html>
